CVE-2021-21357
published 2021-03-23CVE-2021-21357: TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 8.7.40, 9.5.25, 10.4.14, 11.1.1 due to improper input validation…
PriorityP349high8.3CVSS 3.1
AVNACLPRLUINSUCLIHAH
EPSS
1.61%
72.9th percentile
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 8.7.40, 9.5.25, 10.4.14, 11.1.1 due to improper input validation, attackers can by-pass restrictions of predefined options and submit arbitrary data in the Form Designer backend module of the Form Framework. In the default configuration of the Form Framework this allows attackers to explicitly allow arbitrary mime-types for file uploads - however, default _fileDenyPattern_ successfully blocked files like _.htaccess_ or _malicious.php_. Besides that, attackers can persist those files in any writable directory of the corresponding TYPO3 installation. A valid backend user account with access to the form module is needed to exploit this vulnerability. This is fixed in versions 8.7.40, 9.5.25, 10.4.14, 11.1.1.
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| typo3 | cms | >= 10.0.0 < 10.4.14 | 10.4.14 |
| typo3 | cms | >= 11.0.0 < 11.1.1 | 11.1.1 |
| typo3 | cms | >= 9.0.0 < 9.5.25 | 9.5.25 |
| typo3 | cms-core | >= 10.0.0 < 10.4.14 | 10.4.14 |
| typo3 | cms-core | >= 11.0.0 < 11.1.1 | 11.1.1 |
| typo3 | cms-core | >= 9.0.0 < 9.5.25 | 9.5.25 |
| typo3 | cms-form | >= 10.0.0 < 10.4.14 | 10.4.14 |
| typo3 | cms-form | >= 11.0.0 < 11.1.1 | 11.1.1 |
| typo3 | cms-form | >= 8.0.0 < 8.7.40 | 8.7.40 |
| typo3 | cms-form | >= 9.0.0 < 9.5.25 | 9.5.25 |
| typo3 | typo3 | >= 10.0.0 < 10.4.14 | 10.4.14 |
| typo3 | typo3 | >= 11.0.0 < 11.1.1 | 11.1.1 |
| typo3 | typo3 | >= 8.0.0 < 8.7.40 | 8.7.40 |
| typo3 | typo3 | >= 9.0.0 < 9.5.25 | 9.5.25 |
| typo3 | typo3.cms | — | — |
| typo3 | typo3.cms | — | — |
| typo3 | typo3.cms | — | — |
| typo3 | typo3.cms | — | — |
CVSS provenance
nvdv3.18.3HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
nvdv2.06.5MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P
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OSV
Broken Access Control in Form Framework
osv·2021-03-23
CVE-2021-21357 [HIGH] Broken Access Control in Form Framework
Broken Access Control in Form Framework
### Problem
Due to improper input validation, attackers can by-pass restrictions of predefined options and submit arbitrary data in the Form Designer backend module of the Form Framework.
In the default configuration of the Form Framework this allows attackers to explicitly allow arbitrary mime-types for file uploads - however, default _fileDenyPattern_ successfully blocked files like _.htaccess_ or _malicious.php_. Besides that, attackers can persist those files in any writable directory of the corresponding TYPO3 installation.
A valid backend user account with access to the form module is needed to exploit this vulnerability.
### Solution
Update to TYPO3 versions 8.7.40, 9.5.25, 10.4.14, 11.1.1 that fix the problem described.
### Credits
Thank
GHSA
Broken Access Control in Form Framework
ghsa·2021-03-23
CVE-2021-21357 [HIGH] CWE-20 Broken Access Control in Form Framework
Broken Access Control in Form Framework
### Problem
Due to improper input validation, attackers can by-pass restrictions of predefined options and submit arbitrary data in the Form Designer backend module of the Form Framework.
In the default configuration of the Form Framework this allows attackers to explicitly allow arbitrary mime-types for file uploads - however, default _fileDenyPattern_ successfully blocked files like _.htaccess_ or _malicious.php_. Besides that, attackers can persist those files in any writable directory of the corresponding TYPO3 installation.
A valid backend user account with access to the form module is needed to exploit this vulnerability.
### Solution
Update to TYPO3 versions 8.7.40, 9.5.25, 10.4.14, 11.1.1 that fix the problem described.
### Credits
Thank
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-3vg7-jw9m-pc3fhttps://packagist.org/packages/typo3/cms-formhttps://typo3.org/security/advisory/typo3-core-sa-2021-003https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-3vg7-jw9m-pc3fhttps://packagist.org/packages/typo3/cms-formhttps://typo3.org/security/advisory/typo3-core-sa-2021-003
2021-03-23
Published